Wiring Specialties Pro Series Harness Nissan 240sx 1989-1994

Wiring Specialties
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The Wiring Specialties/Sikky Spec LS1 Wiring Harness includes the engine and transmission harnesses for the LS1 engine installed into any LHD S13 240sx. Get a new, Tucked, Wiring Specialties PRO Series harness to run your V8 Beast and make your swap headache-free!

Engine: LS1 5.7L 

  •  Any LS1 from 1999-2002 Camaro, Firebird, GTO, Corvette
  • Supports Engines with DRIVE BY CABLE and T-56 transmission

Chassis: S13 240SX  

  • Any S13 240sx manufactured in 1989-1994
  • Transmission Harness supports 5-speed and Auto to 5-speed conversions

KEY PRO-Series Harness Features:

  • NO CORES NEEDED – nothing… sell your OEM harnesses and buy ours
  • Includes a built-in charge harness for alternator charging
  • Just run the battery cable to the starter
  • Pro Series Construction with TXL High-Temp wire and Adhesive Shrink Tubing
  • ’TUCKED’ designed for cleanest harness routing
  • Includes wiring and relays for Dual OEM LS Fans (just connect to the fans and done)
  • A/C Wiring is available as an Option. Please note that adding A/C to the LSx into 240sx install is not easy and will require custom lines and sensor installation. Wiring Specialties will provide a wiring sub-harness needed for operating the A/C system ONLY.
  • Includes wiring for Oil Pressure, Alternator Dummy Light, Reverse Lights, Reverse Lockout, Skip-Shift Lockout
  • Speeedometer calibration requires SGI-5 Converter
  • Supports the 240sx Tach, no mods needed- Supports Nissan Engine Temp gauge wiring (needs to add sensor)
  • Includes OBD2 Consult port
  • Installs in 20 minutes
  • Improved grounding routing by addition of internal cross-grounding
  • OEM connector specs (no cheap aftermarket connectors that fall apart)
  • Retains OEM wiper functionality
  • Fully tested after production for an easy plug-and-play replacement
  • Replaces the OEM engine harness entirely
  • Transmission Harness supports 5-speed and Auto to 5-speed conversions
  • Turn Key ENGINE START Guarantee
  • Tech support for our customers 7 days a week.  


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